Ngk Spark Plug Company, Limited

Makoto Shimoide

Masaki Mizutani

Shun Sakuma

Yuichi Yamada

Shigeki Mori

Shohei Yoshiyasu

Hirotaka Tsukamatsu

A gas sensor including a plate-shaped detecting element is disclosed, wherein the detecting element has a pair of principle surfaces and a pair of side surfaces adjacent to the pair of principle surfaces, in a radical direction thereof, wherein a first chamfered portion is provided between at least one first principal surface of the pair of principal surfaces and the rear end surface of the detecting element, and wherein the angle between a first axis ridgeline portion formed by the first principal surface and a first side surface that is one of the pair of side surfaces and extending in the direction of the axis, and a first width ridgeline formed by the first principal surface and the first chamfered portion and extending in a width direction is larger than 90&#xb0;.

Gas sensor

A gas sensor element having a chamfered portion. The chamfered portion has a leading end chamfered portion formed in a leading end portion of the gas sensor element, a rear end chamfered portion formed in a rear end portion of the gas sensor element, and an intermediate chamfered portion linking the leading end chamfered portion and rear end chamfered portion. The chamfer angle of the rear end chamfered portion is formed so as to be larger than the chamfer angle of the leading end chamfered portion.

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Aichi-ken, Japan

Makoto Shimoide